Apple Releases Safari Technology Preview 148 With Bug Fixes and Performance Improvements

Apple today released a new update for Safari Technology Preview, the experimental browser Apple first introduced in March 2016. Apple designed the ‌Safari Technology Preview‌ to test features that may be introduced into future release versions of Safari.

Safari Technology Preview Feature
‌Safari Technology Preview‌ release 148 includes bug fixes and performance improvements for Web Inspector, CSS Container Queries, CSS, Forms, Animations, JavaScript, Rendering, Media, Web API, Security, Loading, WebDriver, and more.

The current ‌Safari Technology Preview‌ release is built on the Safari 16 update and it includes support for feature coming in macOS Ventura such as Live Text, Passkeys, Web Extension improvements, and more.

The new build of ‌Safari Technology Preview‌ is compatible with machines running macOS 13 Ventura, unlike prior versions of ‌Safari Technology Preview‌, but it no longer works with macOS Big Sur.

The ‌Safari Technology Preview‌ update is available through the Software Update mechanism in System Preferences to anyone who has downloaded the browser. Full release notes for the update are available on the Safari Technology Preview website.

Apple's aim with ‌Safari Technology Preview‌ is to gather feedback from developers and users on its browser development process. ‌Safari Technology Preview‌ can run side-by-side with the existing Safari browser and while designed for developers, it does not require a developer account to download.

Popular Stories

hikawa phone grip stand apple%402x

Apple Launches Second Limited-Edition iPhone Accessory in a Month

Friday November 21, 2025 3:53 am PST by
Apple has begun selling the Hikawa Phone Grip and Stand, a new limited-edition iPhone accessory designed with accessibility in mind. Designed by LA-based Bailey Hikawa to celebrate the 40th anniversary of accessibility at Apple, the grip uses magnets to securely snap onto any iPhone with MagSafe. Apple says it can be removed with ease, and doubles as a stand with two different viewing...
iOS 26

iOS 26.2 Adds These New Features to Your iPhone

Thursday November 20, 2025 10:50 am PST by
iOS 26.2 is currently in beta testing. The upcoming update includes a handful of new features and changes on the iPhone, including a new Liquid Glass slider for the Lock Screen's clock, offline lyrics for Apple Music, and more. In a recent press release, Apple confirmed that iOS 26.2 will be released to all users in December, but it did not provide a specific release date. Keep reading...
Apple Shopping Event 2025

Apple Announces 2025 Black Friday Event, Here's What You Can Get

Thursday November 20, 2025 6:28 am PST by
Apple's annual four-day Black Friday through Cyber Monday shopping event is returning on Friday, November 28 through Monday, December 1 in many countries, including the United States, Canada, Australia, New Zealand, France, Germany, Italy, Spain, the United Kingdom, Belgium, the Netherlands, Sweden, Thailand, and others. During the shopping event, customers can get an Apple gift card with...
iOS 26 on Three iPhones

iOS 27 Will Reportedly Have Two Key Upgrades

Sunday November 23, 2025 8:48 am PST by
iOS 27 will reportedly have two major elements: quality improvements and new AI features. In his Power On newsletter today, Bloomberg's Mark Gurman said that iOS 27 will be similar to Mac OS X Snow Leopard, in the sense that Apple is focused on improving "quality and underlying performance" over adding new features. Gurman said there is one exception to this rule, though, as he expects...
maxresdefault

The MacRumors Show: iPhone 18 Pro Looks Like a Huge Upgrade

Friday November 21, 2025 9:10 am PST by
On this week's episode of The MacRumors Show, we talk through all of the new features and improvements expected to come to next year's iPhone 18 Pro and iPhone 18 Pro Max models. Subscribe to The MacRumors Show YouTube channel for more videos Apple's next-generation iPhones are less than ten months away and we already have a good idea about what to expect based on corroborated leaks, rumors,...
Apple Foldable Thumb

Foldable iPhone to Debut These Two Breakthrough Features

Wednesday November 19, 2025 7:26 am PST by
Apple's first foldable iPhone is expected to launch alongside the iPhone 18 Pro models in fall 2026, and it's shaping up to include two standout features that could set it apart from the competition. The book-style foldable will reportedly feature an industry-first 24-megapixel under-display camera built into the inner display, according to a recent JP Morgan equity research report. That...
General Black Friday Deals 25 Red

Apple Black Friday Deals Available Now on AirPods, iPads, Accessories, and More

Friday November 21, 2025 8:48 am PST by
We're only a few days away from Black Friday, which will take place on Friday, November 28 in 2025. As always, this will be the best time of the year to shop for great deals, including popular Apple products like AirPods, iPad, Apple Watch, and more. In this article, the majority of the discounts will be found on Amazon. Note: MacRumors is an affiliate partner with some of these vendors. When...
ipad black friday 2025

The Best Early Black Friday iPad Deals

Thursday November 20, 2025 10:20 am PST by
Black Friday is just over a week away, and iPad deals have finally started to flood in at retailers like Amazon and Best Buy. Below we're tracking discounts on every current generation iPad, including lowest-ever prices on M3 iPad Air and M5 iPad Pro, plus steep markdowns on iPad and iPad mini. Note: MacRumors is an affiliate partner with some of these vendors. When you click a link and make a ...
iPhone 17 Pro Cosmic Orange

10 Reasons to Wait for Next Year's iPhone 18 Pro

Wednesday November 19, 2025 4:00 am PST by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models at the same time, which is why we often get rumored features months ahead of launch. The iPhone 18 series is no different, and we already have a good idea of what to expect for the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth...

Top Rated Comments

nortonandreev Avatar
45 months ago
Webpages can't load (macOS Ventura).
Score: 2 Votes (Like | Disagree)
MasterControlProgram Avatar
45 months ago
The big improvement for me that I noticed in the update notes is being able to edit suggested passwords. There’s always that one website that thinks hyphens or non-alphanumeric characters aren’t acceptable, so being able to alter the suggested password is very useful.
Score: 2 Votes (Like | Disagree)
JackNL Avatar
45 months ago

Apple lets Safari lag far, far behind other browsers. EU & Feds start asking questions, and Apple lights up the hiring boards looking for browser engineers. Tim is a good ops guy, but cannot see the forest whilst harvesting its most profitable trees. Fingers crossed Apple is forced to allow other browser engines to power browsing on iOS & iPads. It is really hard to argue that Apple's M$FT-like monopoly on the pad/phone browser app is good for us -- but I am sure many here will flame me with reasons why this is so.
I actually like Safari a lot, it's speedy and the integrated passwords with keychain is excellent - including having your passwords in iOS as well.

(I do run Brave as well for Web3 stuff, but I always come back to Safari for main browsing).
Score: 2 Votes (Like | Disagree)
MauiPa Avatar
45 months ago

Apple lets Safari lag far, far behind other browsers. EU & Feds start asking questions, and Apple lights up the hiring boards looking for browser engineers. Tim is a good ops guy, but cannot see the forest whilst harvesting its most profitable trees. Fingers crossed Apple is forced to allow other browser engines to power browsing on iOS & iPads. It is really hard to argue that Apple's M$FT-like monopoly on the pad/phone browser app is good for us -- but I am sure many here will flame me with reasons why this is so.
I guess, you said it, it must be so. I actually did a browser benchmark test after google (chrome sucks!) bragged about being so fast. Not sure how they doctored their results, but on my m1 MBP, safari and Safari technology preview blew away brave, chrome (didn’t come close to breaking 300 on speedometer as they claimed) and poor Firefox was dismally last. So there is that. Fast, features work. Never confuse personal preference for actually being better or worse, that is not opinion (opinions are based on facts), that is just feelings
Score: 1 Votes (Like | Disagree)
ZipZilla Avatar
45 months ago
RIP Safari on Catalina.

Firefox, Edge and Brave forever!
Score: 1 Votes (Like | Disagree)
brunerd Avatar
45 months ago
Send your 5th birthday wishes to this WebKit bug - it'll be turning 5 years old this July 28th! ??
Bug 174931 ('https://bugs.webkit.org/show_bug.cgi?id=174931') - Implement RegExp lookbehind assertions

Safari is the ONLY major browser that doesn't support this ES2018 feature!? You can look here ('https://kangax.github.io/compat-table/es2016plus/') and it's just this sad little island of red. Why won't they implement this?

Attachment Image
Score: 1 Votes (Like | Disagree)